JPH0614242B2 - Disc player - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disc player.

BACKGROUND ART As an on-vehicle image information providing system, in recent years, navigation (NAVI) for providing image information such as road map information to vehicle occupants in order to facilitate vehicle driving.
The device has been developed and put into practical use. According to this navigation device, for example, the road map information is displayed on the screen of the display arranged in or near the instrument panel in front of the driving of the vehicle, so that the target position, the current position, etc. can be easily obtained while driving the vehicle. Can be checked sequentially, which is very convenient.

By the way, the navigation device can provide not only road map information but also image information such as driving data, maintenance guides, various warnings, etc. Furthermore, when a maintenance guide displays a failure location, a repair method for the failure, etc. It is also possible to provide image information such as instruction manuals. Furthermore, when the map information is displayed on the screen, the map is mainly composed of road information, and additional information indicating the location of a gas station, a restaurant, a hotel, etc. is selectively additionally displayed on the road information. You can also

In order to be able to provide various kinds of image information as described above, it is necessary to store those data in a storage device, which is a semiconductor storage device that is generally known as a storage device in the past. However, since the amount of data to be stored is very large, it is necessary to use a large number of storage devices, resulting in an increase in size and cost of the system.

On the other hand, recently, an on-vehicle CD player that can reproduce a so-called compact disc (CD), a so-called compact disc (CD) capable of reproducing high-quality sound, called a dream audio, has been developed and commercialized. Has been done. This CD is not only used as an audio disk, but also a ROM (Read) that stores data such as image information.
It can also be used as an Only Memory (hereinafter CD-RO)
Referred to as M). Since this CD-ROM has a very large storage capacity and a short access time, if it can be used as a storage device for an in-vehicle image providing system, it is considered to be very advantageous for downsizing and cost reduction of the system. To be

When a CD-ROM is used as a storage device of an in-vehicle image information providing system, it is desired to develop a disc player that can be used as both the original MUSIC CD and the ROM CD.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and MUS
It is an object of the present invention to provide a disc player that can be used by making both an IC CD and a ROM CD compatible.

A disc player according to the present invention is a disc player for playing a recording disc on which a digital information signal and a sub-code information signal are recorded, the reading device reading the sub-code information signal from the recording disc, and the sub-player. Whether the digital information signal is audio data based on the code information signal or CD-
It is configured to have a determination means for determining whether or not it is ROM data, and a control means for controlling to eject the recording disk when the determination result by the determination means is different from a predetermined determination result.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an in-vehicle information providing system for explaining the present invention. An AM / FM tuner 1, a MUSIC CD player 2, a CD-ROM CD.
Four sources, the player 3 and the navigation device 4, are provided as output devices. Of these four sources, the navigation device 4 serves as an output device for providing image information to vehicle occupants, and a CD-ROM C
The D player 3 is a compound operation with the navigation device 4,
It is used as an axial player for reproducing a CD-ROM CD in which image information and the like are stored. The display 5 for displaying the image information is arranged, for example, on the instrument panel in front of the vehicle driver or in the vicinity thereof, and is controlled by the display controller 6. The audio amplifier 7 selects and amplifies the analog audio signal supplied from the AM / FM tuner 1 and the MUSIC CD player 2, and drives the speaker 8.

AM / FM tuner 1, MUSIC CD player 2,
The CD placer 3 for CD-ROM, the navigation device 4, the display controller 6, and the audio amplifier 7 are controlled by the system controller 9 according to the operation key input, and these units are connected by the bus line 10 and the whole. It is configured to operate as a system. That is, the common bus line is used for collective control.

FIG. 2 shows a CD as a disc player according to the present invention.
A configuration example of the players 2 and 3 is shown. In the figure, information recorded on a disk 11 which is a disk-shaped recording medium is read by, for example, an optical pickup 12, and the read signal is amplified by a high frequency amplifier circuit 13 and demodulated by a demodulation circuit 14. The demodulation output of the demodulation circuit 14 is output as digital data after being subjected to signal processing such as deinterleaving and error correction in the signal processing circuit 15. For this signal processing, the memory 16 that temporarily stores demodulated data necessary for the processing is used.

The mechanical control system 17 controls the focus servo system, the tracking servo system and the like of the pickup 12 based on the demodulated output of the demodulation circuit 14 and the spindle motor 18 that rotationally drives the disk 11. A control circuit 19 for controlling the signal processing circuit 15 and the mechanical control system 17 is connected to the system bus line 10 and controlled by the system controller 9 in FIG.

The output of the signal processing circuit 15 is demodulated into digital data. In the MUSIC CD player 2, as shown by the broken line in FIG.
An A / A (digital / analog) conversion circuit 20 is connected, and the D / A conversion circuit 20 demodulates an analog audio signal and supplies it to the audio amplifier 7 in FIG. On the other hand, in the CD player for CD-ROM 3, the output of the signal processing circuit 15 is directly used for various purposes as digital data of the ROM.

It should be noted that both the CD players 2 and 3 are configured such that loading and ejecting of the disc are all automatically performed.

Next, the operation of the system shown in FIG. 1 will be described.

In such a system, the system controller 9 receives operation key input data from an operation unit (not shown) and controls the entire system via the bus line 10.
The AM / FM tuner 1, the MUSIC CD player 2, and the audio amplifier 7 constitute an audio system, and under the control of the system controller 9, the same operation as a normal device is performed.

The CD-ROM CD player 3 reproduces data such as image information recorded (stored) in the CD-ROM, and the reproduction output thereof is used as data for various operations. For example, it is used for various purposes as data for displaying, for example, road map information or car handling instruction information on the screen of the display 5 by a combined operation with the navigation device 4.

In the navigation device 4, it is preferable to always display the road map information on the screen of the display 5 while driving, but if you want to listen to music in parallel, MUSI
It is necessary to simultaneously operate the C CD player 2 and the CD-ROM CD player 3. In this system, MU
The CD players 2 and 3 for separately reproducing the SIC CD and the CD-ROM CD are separately provided, and the MUS
Since the IC CD player 2 has a built-in demodulation device (A / D conversion circuit 20) for converting digital data into analog signals, both CD players can operate independently.
-While using the ROM, it is possible to listen to music by playing the MUSIC CD in parallel.

By the way, MUSIC CD player 2 and CD-ROM
Since the structure is completely the same as that of the CD player 3 for use, when both CD players 2 and 3 are arranged side by side, for example, there is a possibility that a disc of a different reproduction mode is loaded in each player by mistake. is there. In such cases,
The original system operation cannot be performed.

In order to prevent such a problem, the disc player according to the present invention has a configuration in which when a wrong disc is loaded, it is detected and the disc is automatically ejected. The operation at this time will be described with reference to the flowcharts of FIGS. 3 and 4.

FIG. 3 is a flow chart in the case of the MUSIC CD player 2. First, when a disc is set (step 1), the CD player 2 starts playing the disc once (step 2). At this time, the control circuit 19 takes in the output of the signal processing circuit 15, checks the Q channel in the user's bits in the subcode, and determines whether or not the set disc is a MUSIC CD. (Step 3). When it is determined that the disc is not a MUSIC CD, the control circuit 19 controls to eject the disc (step 4), and to warn that, the disc is erroneously displayed on the screen of the display 5 via the display controller 6. It is displayed that it has been set (step 5). If it is determined in step 3 that the disc is properly set, step 6
And the MUSIC disc is reproduced.

FIG. 4 is a flow chart in the case of the CD player 3 for the CD-ROM, but the operation is exactly the same as that of the CD player 2 for the MUSIC, and the disc type is checked by checking the Q channel in the user's bit. It is done by doing.

It should be noted that although a warning regarding incorrect loading of a disc is not always necessary, it is preferable to give a warning when the driver is operating the system, and instead of the display on the screen of the display 5, each CD player. It is also possible to provide an indicator for warning the erroneous loading, and to issue a warning using this indicator. Furthermore, instead of the display, or at the same time, a warning sound may be emitted. Further, when the passenger operates the system, the driver may sometimes feel annoyed by the warning sound in the warning display area, so that the driver can select the warning sound as necessary.

In the above embodiment, the CD-ROM is used as an example of map data and instruction data displayed on the screen of the display 5 as a still image, but the application is not limited to these. is not.

Further, the system shown in FIG. 1 adopts the collective control mode by the common bus line, but the control mode of each unit is not limited to this, and each unit performs one system operation as a whole. Any configuration will do. However, according to the collective control mode by the common bus line, even while the data is being read from the CD-ROM, it is possible to interrupt the operation and send a command to the MUSIC CD player to change the mode. This allows the players to perform parallel operations.

Furthermore, if a CD-ROM is further required due to the expansion of the system, it is possible to use two or more CD players for CD-ROM.

EFFECTS OF THE INVENTION As described above, in the disc player according to the present invention, when the disc which is not the performance target of the disc player is loaded, it is detected and the disc is ejected. . Therefore, even in a system in which a MUSIC CD player and a CD-ROM CD player coexist, such as an in-vehicle information providing system, the user can quickly recognize the erroneous loading of the disk, which is very convenient.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle information providing system, FIG. 2 is a block diagram showing an example of a configuration of a disc player according to the present invention, and FIGS. 3 and 4 show operations in the disc player according to the present invention. It is a flowchart figure shown. Explanation of symbols of main parts 2 ... CD player for MUSIC 3 ... CD player for CD-ROM 4 ... Navigation device 5 ... Display 7 ... Audio amplifier 9 ... System controller

Claims (2)

[Claims] 1. A disc player for playing a recording disc on which a digital information signal and a subcode information signal are recorded, the reading device reading the subcode information signal from the recording disc, and the subcode information. Whether the digital information signal is audio data or a CD-RO
A disc player comprising: a determination unit for determining whether or not the data is M data; and a control unit for controlling to eject the recording disc when the determination result by the determination unit is different from a predetermined determination result. 2. A disc player according to claim 1, further comprising a warning device for issuing a warning when the judgment result of the judgment means is different from a predetermined judgment result.